In a time when record stores are a dying breed, Amoeba Music in Hollywood is a last bastion for those still longing for the good old days of music (and who curse the day auto-tune was invented!).
In addition to buying and selling used CDs, DVDs and records, Amoeba also offers in store concerts. I saw The Shins perform there a while back. At these in store concerts, you stand wedged between the rows and rows of CDs (me on tippy toes). The shows are wonderfully intimate, and free!
Check out this link for the next set of live shows. Be sure to get there early because the place fills to capacity pretty quickly.